There are 34 protons , 45 neutrons and 36 electrons, in that order are present in the anion formed by one atom of 79Se .
Calculation
The number of electron / protons ( present in the nucleus ) of the atom is equal to atomic number .
The sum of number of electron / protons ( present in the nucleus ) and neutrons ( present in the nucleus ) of the atom is called atomic mass.
The atomic number of Se = 34
The Mass number or atomic mass of Se = 79
The anion of Se = [tex]Se^{-2}[/tex]
It means two electron loss by Se and form [tex]Se^{-2}[/tex] .
So , the difference between number of electrons and protons = 2
Hence , number of electron and proton in [tex]Se^{-2}[/tex] anion is 34 ( two less than number of protons ) and 36
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If an isotope of oxygen has 8 protons, 10 neutrons, and 8 electrons, its mass number is_______.
Answer:
mass number = 18
Explanation:
The mass number is the total amount of protons and neutrons in an atom. Therefore, if there are 8 protons and 10 neutrons, the mass number is 18 (8 + 10 = 18).
6.0 mol Al reacts with 4.0 mol O2 to form Al2O3.
4A1+30₂ → 2Al₂O3
How many moles of Al2O3 form when 6.0 mol Al reacts? And how many moles form when 4.0 O2 react?
Answer:
3.0 moles Al₂O₃
Explanation:
We do not know which of the reactants is the limiting reactant. Therefore, you need to convert both of the given mole values into the product. This can be done using the mole-to-mole ratio made up of the balanced equation coefficients.
4 Al + 3 O₂ -----> 2 Al₂O₃
6.0 moles Al 2 moles Al₂O₃
---------------------- x ------------------------- = 3.0 moles Al₂O₃
4 moles Al
4.0 moles O₂ 2 moles Al₂O₃
---------------------- x ------------------------- = 2.7 moles Al₂O₃
3 moles O₂
As you can see, O₂ produces the smaller amount of product. This means O₂ is the limiting reactant. Remember, the limiting reactant is the reactant which runs out before the other reactant(s) are completely reacted. As such, the actual amount of Al₂O₃ produced is 2.7 moles.
However, since this problem is directly addressing how much Al₂O₃ is produced from Al, the answer you most likely are looking for is 3.0 moles Al₂O₃.
If the normal physiological concentration of hco3− is 24 mm , what is the ph of blood if pco2 drops to 35.0 mmhg ?
The pH of blood if pco2 drops to 35.0 mmhg is 7.459
The pH of the blood can be calculated using the Henderson- Hasselbalch equation, it explains the relation between acid dissociation constant pKa and pH in biological and chemical systems.
pH = pK + log ( HCO3- / ( 0.03 * PCO2 ) )
pK is 6.1 for bicarbonate buffer system.
HCO3- = 24mm
PCO2 = 35.0 mmhg
pH = 6.1 + log ( 24 / 0.03 * 35.0 )
= 6.1 + log ( 24 / 1.05 )
= 6.1 + log 22.8571
= 6.1 + 1.3590
= 7.459
Hence, the pH of blood is 7.459
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In an experiment, 10.0 g of magnesium reacted with excess hydrochloric acid forming magnesium chloride. Mg(s) +2HCl(aq) → MgCl2(aq) +H2(g)
At the completion of the reaction, 29.5 g of magnesium chloride was produced. Calculate the percent yield. (Pls help)
Answer: 75.3%
Explanation:
Mg molar mass = 24
MgCl2 molar mass = 94
—> 94 x 10 / 24
29.5/1 x 24/94 x 10
= 29.5 x 24 / 94 x 10
since we are looking for percentage yield we multiply by 100
= 29.5 x 24 x 100 / 94 x 10 = 75.3%
How could you distinguish a compound from a mixture ? Give three characteristics for each case.
Answer:
compound(C) mixture(M)
Explanation:
COMPOUNDS MIXTURES
(C)In nature they are homogeneous. (M)They can be homogeneous as well as heterogeneous in nature.
(C)They have a definite melting and boiling point. (M)They do not have any definite melting or boiling point.
(C)Example: Baking soda, salt, etc.(M) Example: Salt and sand, sugar and water.
6. What is the expected product from the reaction of potassium with oxygen?
О ко
О K2O2
О K2O
KOz
Answer:
K2O2 and KO2 is the answer
Answer:
C.) K₂O
Explanation:
Potassium (K) always forms the cation K⁺.
Oxygen (O) always forms the anion O²⁻.
The ionic compound these two ions form must have an overall charge of 0. However, the dissimilar charges on the ions do not cancel out (+1 + (-2) = -1). Therefore, you need to have two K⁺ ions in the compound to balance the charges (+1 +1 + (-2) = 0).
A mixture of three gases containing an equal number of moles of each gas has a total pressure of 12. 0 atm. What is the partial pressure of each gas?
A mixture of three gases containing an equal number of moles of each gas has a total pressure of 12. 0 atm then partial pressure of each gas is 4 atm .
Calculation ,
According to Dalton law the total gas of the container is equal to the sum of partial pressure of each gas .
[tex]P_{t}[/tex] = [tex]P_{1}[/tex] +[tex]P_{2}[/tex]+ [tex]P_{3}[/tex]
Partial pressure = total pressure × mole fraction
mole of each gas is equal . So, mole fraction is also equal for each gas.
Let the number of mole = x
mole fraction = x/3x =1/3
[tex]P_{1}[/tex] = 12. 0 atm/3 = 4 atm
[tex]P_{2}[/tex] = 12. 0 atm/3 = 4 atm
[tex]P_{3}[/tex] = 12. 0 atm/3 = 4 atm
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What is the molarity of a koh solution if 200 ml of the solution contains 0. 6 moles KOH?
3M
3M is the molarity of a koh solution if 200 ml of the solution contains 0. 6 moles KOH.
Molarity : Molarity is defined as the number of moles of solute present in one liter of solution.
We know that,
Molarity = [tex]\frac{n*1000}{v}[/tex]
where,
n = moles of solute of KOH = 0.6
V= volume of solution in ml= 200 ml
Now on substituting the values in the molarity formula,
molarity = [tex]\frac{0.6*1000}{200}[/tex] = 3M/L
Therefore, molarity = 3M
What is meant by molarity?The amount of a substance in a specific volume of solution is known as its molarity (M). The number of moles of a solute per liter of a solution is known as molarity. The molar concentration of a solution is another name for molarity.To learn more about molarity visit:
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What is the molecular formula of the smallest neutral compound of nitrogen and hydrogen?
N3H is the correct answer.
N3H is the molecular formula of the smallest neutral compound of nitrogen and hydrogen.
What is a molecular formula?an expression that lists the quantity and kind of atoms that make up a substance's molecules.
How can you determine a compound's molecular formula?Subtract the empirical formula for molar mass from the molar mass of the chemical. The outcome ought to be a full number or extremely close to one. Using the entire number discovered in step 2, multiply each subscript in the empirical formula by that number. The molecular formula is the outcome.Empirical and molecular formula: what are they?The simplest whole-number ratio of the various atoms in a compound is represented by an empirical formula. The precise number of various atom types present in a compound's molecule is indicated by the molecular formula.To learn more about molecular formula visit:
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Why are salt and sugar both able to dissolve in water, even though the solutes have different types of chemical bonding?.
The polar water molecules attract the oppositely assessed polar areas of the sucrose molecules and pull them away, resulting in dissolving. Since the ions in salt and the molecules in sugar are very different, their solubilities tend to be additional.
What is chemical bond?A chemical bond is a continuing attraction between atoms, ions, or molecules that promotes the formation of chemical mixtures. The bond may result from the electrostatic significance between oppositely charged ions as in ionic bonds or through the sharing of electrons as in covalent bonds.A chemical bond is what holds atoms concurrently in molecules. Bonds arise from the electrostatic energies between positively charged atomic nuclei and negatively charged electrons (the functions of which in space are determined by quantum mechanics).A chemical bond is a point of attraction between atoms or ions. Bonds form when atoms share or transmit valence electrons. Valence electrons are the electrons in the outer significance level of an atom that may be interested in chemical relations. Valence electrons are the basis of all chemical bonds.To learn more about chemical bond, refer to:
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Bombardment of uranium-238 nuclei by carbon-12 nuclei produces californium-246 and neutrons. Write a complete, balanced equation for this nuclear process
Bombardment of uranium-238 nuclei by carbon-12 nuclei produces californium-246 and neutrons then the complete, balanced equation for this nuclear process is given a ,
[tex]^{238} _{92}U + ^{12} _{6} C[/tex] → [tex]^{246} _{98} Cf + 4^{1} _{0} n[/tex]
Nuclear fusion reactions are defined as the reaction in which, two or more lighter atoms combine to form a heavier atom. The number of atoms formed in this reaction decreases from the given atoms. The nuclear process is also nuclear fusion.
Example : Bombardment of uranium-238 nuclei
Chain reactions are defined as the reaction in which the neutrons that are released in the previous fission reaction act as the starting material in the next reaction. Thus, this process continues to many reactions.
Ionization reaction is defined as the reaction in which an ionic compound dissociates into its ions when dissolved in aqueous solution.
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If you start with 3 moles of sodium and 3 moles of chlorine to produce sodium chloride, what is the limiting reagent?(you will need to balance the equation first.) na cl2 -> nacl
Sodium(Na) is the limiting reagent.
What is Limiting reagent?The reactant that is totally consumed during a reaction, or the limiting reagent, decides when the process comes to an end. The precise quantity of reactant required to react with another element may be estimated from the reaction stoichiometry.
How do you identify a limiting reagent?
The limiting reactant is the one that is consumed first and sets a limit on the quantity of product(s) that can be produced. Calculate how many moles of each reactant are present and contrast this ratio with the mole ratio of the reactants in the balanced chemical equation to get the limiting reactant.
Start by writing the balanced chemical equation that describes this reaction
[tex]2Na_{(s)} + Cl_{2 (g)} -- > 2NaCl_{(s)}[/tex]
Notice that the reaction consumes 2 moles of sodium metal for every 1 mole of chlorine gas that takes part in the reaction and produces 2 moles of sodium chloride.
now we can see that we have 3 moles of sodium and 3 moles of chlorine, according to question. so, we can say that sodium is the limiting reagent in the given situation.
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Write the empirical formula for at least four ionic compounds that could be formed from the following ions
Answer:
NH₄CN, NH₄IO₃, Fe(CN)₃, Fe(IO₃)₃
Explanation:
Cations (positively charged ions) can only form ionic bonds with anions (negatively charged ions). However, you can't just simply put one cation and one anion together to form a compound. Each compound needs to been neutral, or have an overall charge of 0. When cations and anions do not have charges that perfectly cancel, you need to modify the amount of each ion in the compound.
1.) NH₄CN
-----> NH₄⁺ and CN⁻
-----> +1 + (-1) = 0
2.) NH₄IO₃
-----> NH₄⁺ and IO₃⁻
-----> +1 + (-1) = 0
3.) Fe(CN)₃
-----> Fe³⁺ and CN⁻
-----> +3 + (-1) + (-1) + (-1) = 0
4.) Fe(IO₃)₃
-----> Fe³⁺ and IO₃⁻
-----> +3 + (-1) + (-1) + (-1) = 0
a) How would you find the moles of CO2 in a pop? Be sure to describe methods, equipment, and formulas that you would need (10 marks).
b) How would you find the pH of a pop (acid) if you did not have a universal indicator? Be sure to describe methods, equipment, and formulas that you would need (10 marks).
The way to find the moles of CO2 in a pop are:
Write the temperature of the CO2 by adding 273.15 to the number of degrees Celsius.Write the volume of the CO2 container in liters.Write the pressure of the container in atmospheres (atm).Calculate the number of moles of CO2 by the formula n=PV/RTHow to illustrate the information?A mole is a measure of molecules that is equal to approximately 6.022x10^23 molecules. Using the ideal gas formula, one can find the number of moles of carbon dioxide in a container if you know the other needed parameters and conditions.
Based on the above, it should be noted that P is the pressure, V is the volume from, T is the temperature and R is a proportionality constant that is equal to 0.0821 L atm / K mol.
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The atomic models after dalton’s time included ideas about the atomic structure. which atomic model that shows the atomic structure is missing from this set? bohr’s model schrödinger’s model rutherford’s model thomson’s model
Which atomic model that shows the atomic structure is missing from this set?
Dalton’s model
In 1898, J. J. Thomson proposed the first of many atomic models to come as he made the proposition that the shape of an atom was like a sphere.
What is an Atomic Structure?This refers to the way and manner an atom is arranged and the things that are contained in it.
Hence, we can see that an atom contains:
ProtonsNeutronsNucleusTherefore, the atomic model that shows the atomic structure is missing from this set is Dalton's model.
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The complete question is:
The model of the atom has changed as scientists have gathered new evidence. Four models of the atom are shown below, but one important model is missing.
An image at left with overlapping red and blue balls in the center with a circular fuzzy green cloud outside them. An image at center left with a purple ball in the center surrounded by overlapping concentric black ovals, each with a small green ball on each of the 6 ovals. An image at center right with a large black cross in a purple circle with a black line around the purple, with 10 small green balls dispersed within the purple circle.
Which atomic model is missing from this set?
Bohr’s model
Dalton’s model
Rutherford’s model
Thomson’s model
Answer: B. schrodingers model
Explanation:
correct on edge
How many grams of calcium phosphate are theoretically produced if we start with 3. 40 moles of calcium nitrate and 2. 40 moles of lithium phosphate?
There are 372 grams of calcium phosphate are theoretically produced if we start with 3. 40 moles of calcium nitrate and 2. 40 moles of lithium phosphate .
Calculation,
The reactant or reagent that produces the least moles of the products is called limiting reagents. When limiting reagents used up , the reaction stops.
The balanced equation is given as,
[tex]3Ca(NO_{3} )_{2} + 2Li_{3} ( PO_{4} )[/tex] → [tex]3LiNO_{3} + Ca_{3}( PO_{4} )_{2}[/tex]
Multiply the moles of each reactant by the mole ratio between it and calcium phosphate in the balanced equation . so that the moles of the reactant cancel , leaving moles of calcium phosphate.
3.4 mol of calcium nitrate × 1 mol calcium phosphate / 3 mol calcium nitrate = 1.13 mol calcium phosphate
2.4 mol of lithium phosphate× 1 mol calcium phosphate / 2 mol lithium phosphate = 1.02 mol calcium phosphate
So, calcium nitrate is limiting reactant .
Calculation of mass of 1.02 mol calcium phosphate.
Multiply the moles of calcium phosphate by its molar mass.
molar mass of calcium phosphate = 3×40.078 g/mol calcium ion+2×30.9 g/mol phosphorus + 8×15.99 g/mol calcium phosphate = 310.178 g/mol calcium phosphate
1.20 mol calcium phosphate × 310.178 g/mol = 372 gram
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The oxygen consumption rate of a 200 kg seal is 10 ml/(g h). assuming that it has oxygen stores of 2 liters, how many minutes can it dive before running completely out of oxygen?
The oxygen consumption rate of a 200 kg seal is 10 ml/(g h). If it has oxygen stores of 2 liters, then minutes can it dive before running completely out of oxygen is 0.06min.
What is meant by oxygen consumption?Oxygen is one of the most vital element of the organism which is required by almost all the cellular and for all metabolic activities to perform body function.
It is consumed by the respiratory system and passed ro each cell by circulatory system of the body.
Given,
Mass of seal = 200kg = 200000 g
Rate of oxygen consumption = 10 ml/gh
The volume of stored O2 = 2000mL
The time of consumption is calculated as
t = V/mr
t = 2000/200000×10
t = 0.001 hrs
In minutes
t = 0.06min.
Thus 0.06min is required to dive out the oxygen stores of 2 litre.
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Formic acid is as a preservative and antibacterial agent in livestock feed. the pka of formic acid is 3. 75. what is the reaction of formic acid (ch2o2) with water?
Formic acid (ch2o2) on reaction with water undergoes dissociation reaction.
Formic acid is the acid released by ant when it bites which causes us irritation.
It's formula is CH2O2 or HCOOH. and pH is 3.75.
In the case of dehydration, one hydrogen atom in the water molecule joins the hydroxyl group in the trans formic acid to form a new water molecule, while the hydrogen bonded to carbon in the acid breaks off to regenerate a water molecule.
Formic acid dissociates in water according to the equation:
HCOOH (aq) + H2O (l) = H3O + (aq) + HCOO- (aq)
Formic acid is the simplest carboxylic acid, containing a single carbon. Occurs naturally in various sources including the venom of bee and ant stings, and is a useful organic synthetic reagent. Principally used as a preservative and antibacterial agent in livestock feed.
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Identify the compound with the highest boiling point. ch3och3 ch3ch2ch3 ch3ch2oh ch3oh
The compound with the highest boiling point is [tex]CH_{3} CH_{2} OH[/tex] .
So, option C is correct one.
The boiling point depend two factors,
Bonding between moleculeMolecular mass is directly proportional to the boiling point.The boiling point of ether is less than alcohols because alcohol form hydrogen-bonding .The hydrogen bond is strongest bond. So, ethyl alcohol and methyl alcohol has more boiling point than dimethy ether.
The propane molecules have only van-der waals force of attraction, which is weakest force of attraction.So, propane has lowest boiling point.
The molecular mass of ethanol is greater than methaol. So, ethanol has higher boiling point.
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The chemical formula of glycine (a building block of proteins) is c2h5no2. the formula mass of glycine is 75.08 amu. what is the mass percent composition of c in glycine?
The mass percent composition of C in glycine is 31.66%.
What is formula mass?The formula mass of a substance is defined as the sum of the atomic masses of constituent atoms in an ionic compound. This is generally used for ionic compounds which do not contain discrete molecules, but ions as their constituent units.
Given,
Formula mass of C2H5NO2 = Molar mass of C2H5NO2
Molar mass of C2H5NO2 = 75.08 g
Futher we know that the 75.08g of glycine contain 24 g of carbon,
then mass percent composition of C in glycine can be given as,
% C = (mass of carbon/ molar mass of glycine) ×100
%C = (24/ 75.8) × 100
= 31.66%
Thus, we find that the mass percent composition of C in glycine is 31.66%.
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Nitrosyl fluoride (nof) has an atom sequence in which the central atom is n. what is the formal charge on the nitrogen atom?
The formal charge in the central metal atom Nitrogen atom is O.
Structure O=N=f formal charge on N = 0
Formal charge in a Lewis shape, for every atom, you need to count how many electrons. count number all of its lone pair electrons, and 1/2 of its bonding electrons. The difference among the atom's range of valence electrons and the range it owns is the formal rate
Nitrosyl fluoride is used as a solvent and as a fluorinating and nitrating agent in natural synthesis. It has additionally been proposed as an oxidizer in rocket propellants.
The guideline or method for assigning formal rate to atoms in Lewis systems is the subsequent: Formal fee = number of valence electrons - variety of lone-pair electrons + 1/2 range of bonding electrons.
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If the rock had originally 2400 atoms of u 235 and now has 440 left, how many atoms of pb 207 are there in the rock now?
436 atoms of Pb 207 are left in the rock.
Radioactive decay:Alpha and beta decays are the mechanism through which uranium transforms into the lead. While 235U and its daughter nuclides only experience seven alpha and four beta decays, 238U and its daughter nuclides suffer eight alpha and six beta decays overall.
When there are too few neutrons in relation to protons, alpha decay occurs. There is the discharge of an alpha particle, which consists of two protons and two neutrons.
When there are more neutrons than protons, beta decay can happen. A high-speed electron is ejected from a proton that transforms spontaneously from a neutron.
Since gamma radiation is emitted as a wave rather than a particle, the atomic structure of an atom remains unaltered. Atomic fission is the primary cause of neutron emission. At one time, many neutrons can be released.
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What atomic or hybrid orbitals make up the sigma bond between c1 and c2 in ethane, ch3ch3 ?
Atomic or hybrid orbitals make up the sigma bond between c1 and c2 in ethane, ch3ch3 are one s orbital and 2 p orbital
Sigma bonds are the most powerful type of covalent chemical link. They are generated by atomic orbitals overlapping head-on. For diatomic molecules, sigma bonding is most readily explained using the language and tools of symmetry groups.
Chemical covalent bonds are sigma bonds and pi bonds. The overlap of atomic orbitals creates sigma and pi bonds. Sigma bonds are produced by overlapping from end to end, whereas Pi bonds are created when the lobe of one atomic orbital overlaps another.
Sigma bonding can be seen in the link between two hydrogen atoms. Sigma bonds are also formed between the sp3 orbitals of hybridized carbon and the s orbitals of hydrogen in methane.
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Solid iron combines with oxygen gas to form solid iron(III) oxide. Which of the following equations best describes this reaction?
(A) Ir + O₂--> IrO₂
(B) 4 Fe + 3 0₂---> 2 Fe₂O3
(C) I+ 0₂ ---> 10₂
(D) 3 Ir + 0₂ -> 6 Ir₂03
Select one:
O a. A
Ob. B
O C. C
O d. D
Answer:
B. 4 Fe + 3 0₂---> 2 Fe₂O3
Explanation:
(A) Ir + O₂--> IrO₂ No: Ir is iridium
(B) 4 Fe + 3 0₂---> 2 Fe₂O3 Yes: Fe is iron and O is oxygen, and the equation is balanced.
(C) I+ 0₂ ---> 10₂ No: I is iodine
(D) 3 Ir + 0₂ -> 6 Ir₂03 No: I is iodine
If the ph at the half-titration point of a monoprotic weak acid is 4. 2, what is the ka of the acid?.
Ka= 2.1106
The ka value of the acid will be:
Ka=2.1106
Finding the ka of the acid- The idea is that at the half-equivalence point, the pH of the solution will be equal to the pKa of the weak acid.If you're titrating a weak monoprotic acid, which I'll refer to as HA, you already know that at the equivalence point, the strong base will completely neutralize the weak acid.HA(aq)+OH−(aq)→A−(aq)+H2O(l)
Because of this, when you combine an equal number of moles of a weak acid with a strong base, all of the moles of the weak acid will be consumed, leaving you with A, the conjugate base of the weak acid.You have now added enough moles of the strong base to the solution to neutralize half of the weak acid molecules. The equivalent point by half refers to this location.The ratios of the weak acid, strong base, and conjugate base are all 1:1, meaning that what you produce as the conjugate base is what you eat as the weak acid and strong base. Half of the weak acid's moles will be consumed by the reaction, while the conjugate base is generated in an equal amount.Consequently, when a weak acid and a strong base are combined in an equal amount.The weak acid and its conjugate base will therefore be present in equal amounts in the solution at the 50% equivalence point, suggesting that you are now working with a buffer solution.As you are aware, the pH of a weak acid-conjugate base buffer can be determined using the Henderson-Hasselbalch equation pH=pKa+log ([conjugate base][weak acid])You reach the halfway point when
[HA]=[A−]
It implies that
log([HA][A−])=log(1)=0
As a result, it can be claimed that at the half-equivalence point, the pH of the solution and the pKa of the weak acid are equivalent.
pH=pKa at the midpoint of equivalency.
The pKa is determined by the weak acid's acid dissociation constant, Ka. Ka=10pKa, as shown by the formula pKa=log(Ka).
When the two points are half equal, Ka=10pH will exist.
Put in your value to learn Ka=105.67=2.1106.
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What was the oxygen consumption for a burmese python at 20 contractions per minute?
The oxygen consumption for a burmese python at 20 contractions per minute 5,30,35,10,15,20,25 contractions per minute.
PythonThe Eastern Hemisphere's tropical and subtropical regions are home to the genus Python, a family of constricting snakes. For non-venomous flecked snakes, François Marie Daudin suggested the name "Python" in 1803. There are now 10 recognized python species. A new species has been established, and three previously recognized python subspecies have been elevated.
Ythons lack venom, and colubrids (rear-fanged snakes) either lack venom entirely or have a weak venom. It is important to take venomous elapid (front-fanged snake) bites seriously and treat them accordingly. Massive snakes called pythons have a brutal killing style. These snakes, like other strong constrictors like anacondas, will capture their victims with their mouths and wrap around them.
What was the oxygen consumption for a burmese python at 20 contractions per minute?
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Which compound reacts third fastest with fuming sulfuric acid? a. Toluene b. Chlorobenzene d. Nitrobenzene e. Benzene c. Aniline.
Toluene compound reacts third fastest with fuming sulfuric acid.
The reaction is attached in figure -
When nitration of toluene is carried out in presence of fuming nitric acid and fuming sulfuric acid under 333 K temperature , 2, 4, 6-trinitro toluene is the final product .This 2, 4, 6-trinitro toluene is also called TNT. TNT is used as explosive.What is toluene?
Toluene is a common ingredient in degreasers. It's a colorless liquid with a sweet smell and taste. It evaporates quickly. Toluene is found naturally in crude oil, and is used in oil refining and the manufacturing of paints, lacquers, explosives (TNT) and glues.What is a toluene used for?
Toluene is found naturally in crude oil, and is used in oil refining and the manufacturing of paints, lacquers, explosives (TNT) and glues. In homes, toluene may be found in paint thinners, paintbrush cleaners, nail polish, glues, inks and stain removers.Learn more about Toluene
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The surfaces of the cylinder block and cylinder head are _______ to help cool the engine.
The surfaces of the cylinder block and cylinder head are interconnected to help cool the engine.
When an automobile engine is running, it generates a lot of heat and needs to be continuously cooled to prevent engine damage.
This is typically accomplished by pumping coolant liquid—often water combined with antifreeze solution—through unique cooling tubes. Air passing across cylinder casings with fins helps cool some engines.
The cylinder head and block of a water-cooled engine are interconnected by coolant channels. All of the channels come together to form a single exit at the top of the cylinder head.
Hot coolant is forced out of the engine and into the radiator, which serves as a type of heat exchanger, by a pump that is driven by a pulley and belt from the crankshaft.
Unwanted heat is transferred from the radiator into the air stream, after which the cooled liquid flows back into the channels after returning to an entrance at the bottom of the block.
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Which combination of properties would be expected to lead to the most viscous liquid?
The combination of properties would be expected to lead to the most viscous liquid include:
Low temperatureStrong intermolecular forceWhat is Viscosity?This is defined as the resistance of a liquid to flow and is characterized by its sticky nature.
This is as a result of the strong intermolecular forces which holds the atoms together and low temperature keeps them in shape thereby making it the most appropriate c hoice.
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Consider the slightly soluble base bs(oh)2. if the molar solubility of the base is 1.82 ⋅ 10 − 2 , what concentration of hydroxide is dissolved in a saturated solution?
Answer:
Explanation to the following: